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vcpkg_cmake_get_vars.md

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vcpkg_cmake_get_vars

The latest version of this document lives in the vcpkg repo.

Runs a cmake configure with a dummy project to extract certain cmake variables

Usage

vcpkg_cmake_get_vars(<out-var>)

vcpkg_cmake_get_vars(<out-var>) sets <out-var> to a path to a generated CMake file, with the detected CMAKE_* variables re-exported as VCPKG_DETECTED_CMAKE_*.

Additionally sets, for RELEASE and DEBUG:

  • VCPKG_COMBINED_CXX_FLAGS_
  • VCPKG_COMBINED_C_FLAGS_
  • VCPKG_COMBINED_SHARED_LINKER_FLAGS_
  • VCPKG_COMBINED_STATIC_LINKER_FLAGS_
  • VCPKG_COMBINED_EXE_LINKER_FLAGS_

Most users should use these pre-combined flags instead of attempting to read the VCPKG_DETECTED_* flags directly.

Notes

Avoid usage in portfiles.

All calls to vcpkg_cmake_get_vars will result in the same output file; the output file is not generated multiple times.

Basic Usage

vcpkg_cmake_get_vars(cmake_vars_file)
include("${cmake_vars_file}")
message(STATUS "detected CXX flags: ${VCPKG_DETECTED_CMAKE_CXX_FLAGS}")

Source

ports/vcpkg-cmake/vcpkg_cmake_get_vars.cmake